eth_chainId - opBNB RPC Method
Get the chain ID for opBNB. Essential for transaction signing and network verification.
Returns the chain ID used for transaction signing on opBNB.
Why opBNB? Build on Binance's high-performance L2 processing 100M+ daily transactions with the lowest L2 gas fees with sub-$0.0001 gas fees, 5-10K TPS, sub-second block times via Volta/Maxwell upgrades, and OP Stack architecture.
Use Cases
The eth_chainId method is essential for:
- Transaction signing - Ensure transactions are signed for the correct network
- Network verification - Confirm connection to the expected chain
- Multi-chain apps - Handle different networks programmatically
- Wallet integration - Validate network before transactions
Code Examples
Related Methods
net_version- Get network versioneth_syncing- Check sync status
debug_traceTransaction
Trace a transaction execution on opBNB. Requires archive node for debugging fully on-chain games, high-frequency DeFi, and cost-sensitive applications on BNB Chain.
eth_syncing
Check the sync status of your opBNB node. Returns sync progress or false when fully synced — essential for node health monitoring and dApp reliability.